This poem is from the Hortulus Carminum Selectorum by Josephus Perez (1627-1694).
Promissis Adde Fidem
Festinus nimium cave des promissa cuiquam,
Pollicitisque semel dum potes adde fidem.
The vocabulary is keyed to the DCC Latin Vocabulary list. There are two words in this poem that are not on the DCC list:
festīnus, -a, -um: quick, in a hurry
pollicitum (polliciti, n.): promise
addō -dere -didī -ditum: give to
caveō cavēre cāvī cautum: be on guard, beware
dō dare dedī datum: give
dum: while (+ indic.); until (+ subj.); provided that (+ subj.)
fidēs -eī f.: trust, faith
nimius -a -um: too much, excessive; nimis or nimium: excessively
possum posse potuī: be able
prōmittō -mittere -mīsī -missum: send forth, offer
que (enclitic) - and
quis- quicquam/quidquam: any (single) person, anyone at all
semel: once